[SWTXBelle]

There is no doubt that all sorts of bad behavior exists in any and all groups. Lying, cheating, fist fights, gossip, hazing - all kinds of "shetty" (sic) behavior - you name it, we all know that humans are imperfect and that will be reflected in their actions.
What distinguishes a person of character is how they deal with it. Also, whether they contribute to the solution - or by their actions condone it. Leaving instead of trying to affect a change is the easy way out - but it didn't help the chapter, and in fact probably hurt it. If there were other women who felt as you did, it is possible that you could have changed things for the better from the inside. It's possible - I've done it.
You are lucky you didn't have an advisor who was more on the ball - not reporting your grades to the chapter should have resulted in a discussion with you as to why. Most organizations can find out your status - full-time student or no, so I'm amazed your GLO didn't. Maybe they just didn't want to deal with it; who knows.
I HAD to take alumna status upon my marriage the summer of my junior year - and I wanted to stay as an active. I couldn't, but did all I could to help my chapter (I served as Rush Advisor).
You may cheat the system, and brag about doing so, but don't be surprised when you are not admired for it.
And if your friends who know you were in a house know you lied and don't mind - that says more about them and their ethics then it does about the validity of your actions.